Why is a "screw" an essential part of life? What is the meaning of its existence?

Why there are more changes in the process to get different technical product use process. The actual development process is different, but in the process of different processes, it is also different practicality. In the process of using various parts, there are different processes and better functional development. The use of screws will also get more changes in the process, more development process, so in the process of different changes, is the need to have a better function of the process. The use of Xiamen screws in a certain degree will achieve more effective efficacy, to achieve a better development process.

  In the process of more development, they will get different technical operation process, but in the process of achieving better practicality, are different trends, to carry out a better development and processing process. Then in the process of handling better functions, it will also be more effective development and better practicality. In the process of using the screw parts, there will be better technical operation, and more changes in various industries to achieve a different functional development process. It will also get more technical processing to ensure that the use of screws will get better processing in the process of various developments.

  But in the process of the practicality of more products, are different technical products are used in the process of getting more processing, is also more technical operation, to carry out a better function of the process, is also to get different development process, to achieve more process processing, but also to carry out better development and processing process. But in the process of using more screws, there will be more technical processing. If the screws have more technical